Combine sugar and water in a 2 1/2- to 3-quart saucepan. Squeeze juice from lemon and orange into sugar mixture. Add fruit halves and cinnamon sticks. Bring mixture to a boil over moderate heat, uncovered, stirring occasionally, until sugar is dissolved, then simmer 10 minutes. Stir in honey and return to a boil. Remove from heat and cool to room temperature. Pour through a sieve into a large measuring cup or bowl, pressing hard on, then discarding, solids. Chill, uncovered, until cold, about 1 hour.
